Home / 1,019,985.30-1,530,354.60-420,998.40

Finding the Fourth Proportional to 1,019,985.30, 1,530,354.60 and 420,998.40

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Solution

The fourth proportional to 1,019,985.30, 1,530,354.60 and 420,998.40 is: 631,653.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019,985.30 : 1,530,354.60 = 420,998.40 : x
  2. Step 2: Convert to fraction form
    1,019,985.30/1,530,354.60 = 420,998.40/x
  3. Step 3: Cross multiply
    1,019,985.30x = 1,530,354.60 × 420,998.40
  4. Step 4: Simplify right side
    1,019,985.30x = 644,276,838,032.64
  5. Step 5: Solve for x
    x = 644,276,838,032.64/1,019,985.30
  6. Step 6: Final answer
    x = 631,653.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.